2 pango-font.cc -- implement Pango_font
4 source file of the GNU LilyPond music typesetter
6 (c) 2004--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #define PANGO_ENABLE_BACKEND // ugh, why necessary?
10 #include <pango/pangoft2.h>
11 #include <freetype/ftxf86.h>
17 #include "pango-font.hh"
19 #include "open-type-font.hh" // Index_to_charcode_map
21 #include "dimensions.hh"
22 #include "file-name.hh"
23 #include "international.hh"
24 #include "lookup.hh" // debugging
26 #include "string-convert.hh"
32 Pango_font::Pango_font (PangoFT2FontMap *fontmap,
33 PangoFontDescription *description,
37 physical_font_tab_ = scm_c_make_hash_table (11);
38 PangoDirection pango_dir = PANGO_DIRECTION_LTR;
40 = pango_ft2_get_context (PANGO_RESOLUTION, PANGO_RESOLUTION);
41 // context_ = pango_ft2_font_map_create_context (fontmap);
43 pango_description_ = pango_font_description_copy (description);
44 attribute_list_ = pango_attr_list_new ();
47 urgh. I don't understand this. Why isn't this 1/(scale *
48 resolution * output_scale)
52 output_scale_ = output_scale;
53 scale_ = INCH_TO_BP / (Real (PANGO_SCALE) * Real (PANGO_RESOLUTION) * output_scale);
56 ugh. Should make this configurable.
58 pango_context_set_language (context_, pango_language_from_string ("en_US"));
59 pango_context_set_base_dir (context_, pango_dir);
60 pango_context_set_font_description (context_, description);
63 Pango_font::~Pango_font ()
65 pango_font_description_free (pango_description_);
66 g_object_unref (context_);
67 pango_attr_list_unref (attribute_list_);
71 Pango_font::register_font_file (string filename, string ps_name)
73 scm_hash_set_x (physical_font_tab_,
74 scm_makfrom0str (ps_name.c_str ()),
75 scm_makfrom0str (filename.c_str ()));
79 Pango_font::derived_mark () const
81 scm_gc_mark (physical_font_tab_);
85 map<string, Index_to_charcode_map > filename_charcode_maps_map;
86 Index_to_charcode_map const *get_index_to_charcode_map (string postscript_name, FT_Face face);
89 Index_to_charcode_map const *
90 get_index_to_charcode_map (string filename, FT_Face face)
92 if (filename_charcode_maps_map.find (filename) == filename_charcode_maps_map.end ())
93 filename_charcode_maps_map[filename] = make_index_to_charcode_map (face);
95 if (filename_charcode_maps_map.find (filename) == filename_charcode_maps_map.end ())
98 return &filename_charcode_maps_map[filename];
102 get_glyph_index_name (char *s, FT_ULong code)
104 sprintf (s, "glyphIndex%lX", code);
108 get_unicode_name (char*s, FT_ULong code)
111 sprintf (s, "u%lX", code);
113 sprintf (s, "uni%04lX", code);
118 Pango_font::pango_item_string_stencil (PangoItem const *item, string str,
119 bool tight_bbox) const
121 const int GLYPH_NAME_LEN = 256;
122 char glyph_name[GLYPH_NAME_LEN];
123 PangoAnalysis const *pa = &(item->analysis);
124 PangoGlyphString *pgs = pango_glyph_string_new ();
126 pango_shape (str.c_str () + item->offset,
127 item->length, (PangoAnalysis*) pa, pgs);
129 PangoRectangle logical_rect;
130 PangoRectangle ink_rect;
131 pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
133 PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
137 FT_Face ftface = pango_fc_font_lock_face (fcfont);
139 PangoRectangle const *which_rect
144 Box b (Interval (PANGO_LBEARING (logical_rect),
145 PANGO_RBEARING (logical_rect)),
146 Interval (-PANGO_DESCENT (*which_rect),
147 PANGO_ASCENT (*which_rect)));
150 char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
151 FcPattern *fcpat = fcfont->font_pattern;
152 FcChar8 *file_name_as_ptr = 0;
153 FcPatternGetString (fcpat, FC_FILE, 0, &file_name_as_ptr);
156 if (file_name_as_ptr)
158 /* Normalize file name. */
159 file_name = File_name ((char const *)file_name_as_ptr).to_string ();
162 SCM glyph_exprs = SCM_EOL;
163 SCM *tail = &glyph_exprs;
165 Index_to_charcode_map const *cmap = 0;
166 bool has_glyph_names = ftface->face_flags & FT_FACE_FLAG_GLYPH_NAMES;
167 if (! has_glyph_names)
168 cmap = get_index_to_charcode_map (file_name, ftface);
170 bool is_ttf = string (FT_Get_X11_Font_Format (ftface)) == "TrueType";
171 bool cid_keyed = false;
172 for (int i = 0; i < pgs->num_glyphs; i++)
174 PangoGlyphInfo *pgi = pgs->glyphs + i;
176 PangoGlyph pg = pgi->glyph;
177 PangoGlyphGeometry ggeo = pgi->geometry;
179 glyph_name[0] = '\0';
182 int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name, GLYPH_NAME_LEN);
184 programming_error ("FT_Get_Glyph_Name returns error");
187 SCM char_id = SCM_EOL;
188 if (glyph_name[0] == '\0'
191 && cmap->find (pg) != cmap->end ())
193 FT_ULong char_code = cmap->find (pg)->second;
194 get_unicode_name (glyph_name, char_code);
197 if (glyph_name[0] == '\0' && has_glyph_names)
199 programming_error (_f ("Glyph has no name, but font supports glyph naming.\n"
200 "Skipping glyph U+%0X, file %s",
202 file_name.c_str ()));
207 if (glyph_name == string (".notdef") && is_ttf)
208 glyph_name[0] = '\0';
210 if (glyph_name[0] == '\0' && is_ttf)
212 // access by glyph index directly.
213 get_glyph_index_name (glyph_name, pg);
216 if (glyph_name[0] == '\0')
222 char_id = scm_from_uint32 (pg);
225 char_id = scm_makfrom0str (glyph_name);
227 *tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
228 scm_from_double (ggeo.x_offset * scale_),
229 scm_from_double (ggeo.y_offset * scale_),
233 tail = SCM_CDRLOC (*tail);
236 PangoFontDescription *descr = pango_font_describe (pa->font);
237 Real size = pango_font_description_get_size (descr)
238 / (Real (PANGO_SCALE));
242 warning (_f ("no PostScript font name for font `%s'", file_name));
247 && (file_name.find (".otf") != NPOS
248 || file_name.find (".cff") != NPOS))
251 /* UGH: kludge a PS name for OTF/CFF fonts. */
252 string name = file_name;
253 ssize idx = file_name.find (".otf");
255 idx = file_name.find (".cff");
257 name = name.substr (0, idx);
259 ssize slash_idx = name.rfind ('/');
260 if (slash_idx != NPOS)
263 name = name.substr (slash_idx,
264 name.length () - slash_idx);
267 string initial = name.substr (0, 1);
268 initial = String_convert::to_upper (initial);
269 name = name.substr (1, name.length () - 1);
270 name = String_convert::to_lower (name);
271 ps_name = initial + name;
273 else if (ps_name_str0)
274 ps_name = ps_name_str0;
276 if (ps_name.length ())
278 ((Pango_font *) this)->register_font_file (file_name, ps_name);
279 pango_fc_font_unlock_face (fcfont);
281 SCM expr = scm_list_5 (ly_symbol2scm ("glyph-string"),
282 scm_makfrom0str (ps_name.c_str ()),
283 scm_from_double (size),
284 scm_from_bool (cid_keyed),
285 ly_quote_scm (glyph_exprs));
287 return Stencil (b, expr);
290 warning (_ ("FreeType face has no PostScript font name"));
295 Pango_font::physical_font_tab () const
297 return physical_font_tab_;
302 Pango_font::word_stencil (string str) const
304 return text_stencil (str, true);
308 Pango_font::text_stencil (string str) const
310 return text_stencil (str, false);
314 Pango_font::text_stencil (string str, bool tight) const
317 = pango_itemize (context_,
319 0, str.length (), attribute_list_,
326 Direction text_dir = RIGHT;
327 for (GList *p = items; p; p = p->next)
329 PangoItem *item = (PangoItem *) p->data;
330 if (item->analysis.level == PANGO_DIRECTION_RTL)
334 for (GList *ptr = items; ptr; ptr = ptr->next)
336 PangoItem *item = (PangoItem *) ptr->data;
338 Stencil item_stencil = pango_item_string_stencil (item, str, tight);
340 if (text_dir == RIGHT)
342 item_stencil.translate_axis (last_x, X_AXIS);
343 last_x = item_stencil.extent (X_AXIS)[RIGHT];
345 else if (text_dir == LEFT)
347 dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
350 #if 0 /* Check extents. */
351 if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
353 Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
356 Stencil dimless_frame (empty, frame.expr ());
357 dest.add_stencil (frame);
361 dest.add_stencil (item_stencil);
365 UGH. Should have flags per output format signifying supported
368 if (output_backend_global != "ps"
369 && output_backend_global != "eps")
372 For Pango based backends, we take a shortcut.
375 = scm_list_3 (ly_symbol2scm ("utf-8-string"),
376 scm_makfrom0str (description_string ().c_str ()),
377 scm_makfrom0str (str.c_str ()));
379 Box b (Interval (0, 0), Interval (0, 0));
380 b.unite (dest.extent_box ());
381 return Stencil (b, exp);
389 Pango_font::description_string () const
391 char *descr_string = pango_font_description_to_string (pango_description_);
392 string s (descr_string);
393 g_free (descr_string);
399 Pango_font::font_file_name () const